package cn.edu.ctbu.thymeleafwork.webapi;

import cn.edu.ctbu.thymeleafwork.core.PageUtils;
import cn.edu.ctbu.thymeleafwork.domain.Student;
import cn.edu.ctbu.thymeleafwork.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import java.util.Map;
import java.util.HashMap;


import java.util.List;

@RequestMapping("/webapi/student")
@RestController
public class StudentRestController {

    @Autowired
    private StudentService studentService;

    /**
     * 读取的url:/webapi/student/list
     * @return
     */
    @GetMapping("/list")
    public List<Student> getAll(){

        List<Student> students=studentService.findAll();

        return students;
    }

    /**
     * 新增学生的方法/webapi/stuednt/insert
     * @param student
     * @return
     */
    @PostMapping ("/insert")
    public Student insert(Student student){
        Student student1=studentService.insert(student);
        return student1;
    }

    /**
     * 更新学生的方法/webapi/stuednt/update
     * @param student
     * @return
     */
    @PutMapping ("/update")
    public Student update(Student student){
        //读取旧的数据
        Student student1=studentService.getById(student.getId());

        if(StringUtils.isEmpty(student.getPassword())){
            //没有新密码，那么就用旧密码
            student.setPassword(student1.getPassword());
        }
        student=studentService.update(student);
        return student;
    }

    /**
     * 删除学生的方法/webapi/stuednt/delete
     * @param id
     * @return
     */
    @DeleteMapping  ("/delete/{id}")
    public void delete(@PathVariable Integer id){
        studentService.delete(id);
    }

    /**
     * 通过姓名分页查询学生的方法/webapi/stuednt/getbyname/name
     * @param name
     * @return
     */
    @GetMapping("/getbyname/{name}")
    public Map<String, Object> getStudentByName(@PathVariable String name, Pageable pageable) {
        Page<Student> students = studentService.findByName(name, pageable);
        Map<String, Object> result = new HashMap<>();
        result.put("total", students.getTotalElements());
        result.put("rows", students.getContent());
        return result;
    }

    /**
     * 读取的url:/webapi/student/get/id
     * @return
     */
    @GetMapping("/get/{id}")
    public Student get(@PathVariable Integer id){

        Student student=studentService.getById(id);
        student.setPassword("");

        return student;
    }

    /**
     * 分页读取全部内容
     * @return
     */
    @GetMapping("/getbypage")
    public PageUtils getByPage(@RequestParam(value = "page",defaultValue = "0") Integer page,
                               @RequestParam(value = "size",defaultValue = "10") Integer size){

        //按id排倒序
        Sort sort= Sort.by(Sort.Direction.DESC,"id");
        Pageable pageable=PageRequest.of(page,size,sort);
        Page<Student> studentPage=studentService.findAll(pageable);

        PageUtils pageUtils=new PageUtils(studentPage.getContent(),studentPage.getTotalElements());

        return pageUtils;
    }

    /**
     * 通过姓名查询
     * @param name
     * @return
     */
    @GetMapping("/search")
    public List<Student> searchStudents(@RequestParam("name") String name) {
        List<Student> students = studentService.findByNameLike(name);
        return students;
    }


}
